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Rose-Hulman CE 489 - Study Notes

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Making Snow and Ice Removal More Environmentally FriendlyTeam IntroductionsClient and CompanyProject DescriptionProject ApproachPreliminary Feasibility StudySite VisitCurrent OperationCodes and RegulationsRecycling of ChemicalsInfrared SystemsRedesign of Deicing PodsAssessment of Design OptionsClient WeightingDecision Matrix - Aircraft DeicingLocation/LayoutPod Design (aircraft flow)Pod Design (runoff flow)Pond SizeStatisticsFinal SizingPipe and Channel SizingPipe and Channel SizingPipe and Channel SizingBest Management Practices (BMP)BMPsBMPsBMPsBMPsCostsCostsCostsMaking Snow and Ice Removal More Environmentally FriendlyTeam IntroductionsChristopher Armstrong – Client LiasonMark Johanning – EditorWill Kenny – Project EngineerDavid McIlwaine – Project EngineerRobbie Wilson – Project ManagerClient and CompanyTodd CavenderEnvironmental ManagerBAA Indianapolis, LLCIndianapolis International AirportProject Description Airport Deicing Propylene Glycol EPA updating regulations for 2009 Currently these are not available for public review FAA Competition Adequate design for airports nation-wide Apply design at IndianapolisProject Approach Preliminary Feasibility Study Design Options Assessment of Design OptionsPreliminary Feasibility StudyWatershedMapsSite VisitChecking BOD Levels in Retention BasinsCurrent Operation Glycol is sprayed onto planes/runways Sent to retention basin with storm runoff Diluted and released to streamCodes and Regulations FAA Design Guidelines EPA Water Regulations NPDES PermitRecycling of Chemicals Collect used Glycol, separate from storm runoff Filter and Distill Glycol to raise concentration for resale Minimize glycol in environmentInfrared Systems Currently in JFK and Buffalo Use of infrared heat to deice aircraft Warms aircraft surface to lower need of anti-icingRedesign of Deicing Pods Centralized Deicing Pods Gutter collection Helps facilitate recycling Already implemented by Fed-ExAssessment of Design Options Discussed most important criterion with Todd Cavender The rankings were determined by DSL and agreed upon by our client, Todd CavenderCapital Cost Rating Effect on Environment Rating$0 - $2 million 3 Significant Benefit 3$2 - 10 million 2 Slight Benefit 2$10 million and up 1 No Benefit 1Operation Cost Rating Deicing Time RatingCost Reduction 3 Shorter Deicing Time 3Equal Cost as Current Use 2 Equal Deicing Time 2Cost Increase 1 Longer Deicing time 1Client WeightingCriterion WeightCapital Cost 30%Operation Cost 20%Environment 10%Deicing Time 40%Decision Matrix - Aircraft DeicingRedesign of PodsScoreWeighted Score20.6030.6030.3031.20Total = 2.70Location/LayoutThe Pond will be located just southwest of FedEx operations, directly west of a service road.Pod Design (aircraft flow)Pod Design (runoff flow)Pond Size Pond will hold deicing and anti-icing fluids as well as water runoff due to winter storm events for a period of ten days. Snow can be converted to liquid by multiplying the amount by 1/10. 135 years of snowfall data showed 12.1 inches to be the peak daily snowfall.Statistics From looking at probability statistics and accounting for our client’s wishes, DSL determined that 1.5 storm events could occur in the ten day period. This results in a liquid runoff of 1.815 inches per acre. Pods total area is 24.05 acres. Using IIA deicing statistics, 17,000 gallons of ADF fluid was used per inch of snow.Final Sizing The pond will have a geomembrane lining preventing filtration into underlying soils. The 2:1 slope will help prevent growth of weeds. Water fowl will be repelled using the same methods currently used at other IIA ponds and basins. The pond will be properly fenced ensuring the safety of those around it.Water Runoff:1.185 mill galADF Runoff:308,000 gal1.5 Million GallonsPipe and Channel Sizing Time of concentration and IDF curves used to get storm intensity Rational equation used to find 50 year design flows Manning’s equation used to size channel and pipes Use concrete rectangular channel and standard size concrete pipesPipe and Channel Sizing Channel is 7.5 feet wide and 3 feet deep Built 3.5 feet deep for half foot of freeboard Culvert between pod two and three has diameter of 7 feet Pipe from channel to pod one has diameter of 7 feet Pipe from pod one to pond has diameter of 6 feet Smaller diameter is due different time of concentration and tributary areaPipe and Channel SizingBest Management Practices (BMP) Enclosed-Basket Deicing Trucks Allows deicer to get closer to aircraft More direct application, less waste Forced Air System Use forced air when applying deicing fluid Helps remove snow and cuts on fluid useBMPsBMPs Preventative Anti-icing Watch weather patterns and apply anti-icing fluids before ice can form FAA provides a weather watch service Lessens need to deice aircraft Hangar Storage No condensation overnight which eliminates ice formation Heated hangars can deice planes that can sit between flightsBMPs Enclosed-basket deicing trucks and forced air systems can be used together to reduce fluid use further Preventative anti-icing is the timing of application, so it can be used to enhance any BMP Hangar storage requires large financial and land contributions and is thus not recommendedBMPs• IIA is to implement three best management practices• Forced Air• Enclosed Basket• Preventative Anti-icing• This reduces ADF use by 60%Reductions From BMPs0.3080.1201.181.51.300.20.40.60.811.21.41.6Million GallonsADF Use WaterRunoffTankSizeWithout BMPsWith BMPsCostsPipe CostItem Means Reference Details Quantity UnitBare CostsTotal CostPiping network$4,415,000.00Pipe 02510-810-3080 3725.3 L.F. $288.50 $1,075,000.00Pipe 02510-810-3070 3292 L.F. $236.55 $780,000.00Trenching A12.3-110-14600 to 1 slope, 8' wide, 12' deep, 1-1/4 Cubic Yard Bucket7017.3 L.F. $21.26 $149,000.00Roadway Removal02220-875-2100 Concrete, 7" to 24" thick, reinforced 42448 C.F. $56.79 $2,411,000.00Pavement 02750-100-0500 Fixed form, 12' pass, 15" thick 2358 S.Y. $33.73 $80,000.006' Diameter, Prestressed (PCCP), 150 PSI7' Diameter, Prestressed (PCCP), 150 PSI$4,415,000CostsPod CostItem Means Reference Details Quantity Unit Bare Costs Total CostDeicing Pod $3,245,000.00Pavement 02750-100-0500 Fixed form, 12' pass, 15" thick 96219 S.Y. $33.73 $3,245,000.00Item Means


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Rose-Hulman CE 489 - Study Notes

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